Variables derived from analgesic intake: The Pain
Management Index (PMI) is a composite measure to
assess the adequacy of analgesic prescription. It is computed by subtracting a patient’s worst pain intensity from
the rating of the most potent analgesic prescribed [34].
Scores can range from −3 to 3, with negative scores indicating low adequacy. The PMI is one of the most used
outcome measures for quality of pain treatment [35-37].
Opioid intake per day: All doses of opioids will be
converted to morphine equivalents per 24 hours. Total
and ATC doses of the opioid analgesics taken by patients
will be calculated.